Police searched Wednesday for a 10-year-old girl whose parents reported she vanished overnight from their home in a Los Angeles suburb.
Nicole Ryan's parents said she was last seen in her bedroom after midnight and was gone when they checked on her a few hours later, police spokesman Richard French said.
There was no indication of foul play, and the parents said nothing happened in the Northridge house that might have prompted the girl to run away, French said.
Officers went door to door and were interviewing the girl's classmates and friends. KABC-TV said police were inspecting security video from nearby buildings.
Police Lt. Terri Brinkmeyer said the FBI was contacted and will be helping with the search.
"We have no idea if it's family, if it's a kidnapping, we don't know if she wandered off," Brinkmeyer said. "There are any number of things that could have happened, but we're not leaning toward any of them."
Brinkmeyer said Nicole did not have a history of running away.
"She's a good kid. She's not a troublemaker, and this isn't anything she would normally do," he said.
The girl was described as white, 4 feet 11, about 100 pounds, with long red hair.
Police said she was wearing a black T-shirt emblazoned with characters from the TV show "Heroes."